Mechanism for raising the harness frames of looms



Nov. 27, 1951 Filed Aug. 17,

F. N. TOWLE ET AL MECHANISM FOR RAISING THE HARNESS FRAMES OF' LOOMS 2 SHEETS--SHEET 1 NOV. 27, 1951 F, N TOWLE E-'l-AL 2,576,428

MECHANISM FOR RAISING THE HARNESS FRAMES oF LooMs Filed Aug. 17, 1949 2 SHEETS-smi" 2 Fl' l 4, INVENTOR E M72, 7

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Patented Nov. 27,v 1951 y' MEoHANIsM FoR Rius-ING ma HARNESS FRAMES oF LooMs Frank N. Towle and Beatrice E. Towle,

Soquel, Calif.

Application August 17, 1949, Serial N0. 110,716

2 Claims. (Cl..139`30) This invention relates to an improved mechanism for raising the harness frames of looms and has special reference to a loom known in the trade as the jack-type and in which a series of spaced harness frames are provided and are -raised by a plurality of manually operative treadles connected to levers associated' with the frames, the purpose of the said harness frames being to raise and separate different portions of the warped thread in order to obtain a pattern inthe finished material.

A serious disadvantage exists in controllingthe harness frames in all jack-type looms due to the fact that a diierent length of movement necessitating a different pressure is required to individually lift each harness frame, thus making the work extremely tedious for the operator.

An object of the present invention is t eliminate the unequal movements required on the different treadles to raise the various harness frames by providing a specially constructed mechanism associated with and connected to the treadles, which mechanism will enable the length of movement of each treadle' and the pressure required to operate the same to be exactly equal to raise any one of a series of harness frames the same height regardless of the number.

Another object of the present invention is to provide a horizontal bar, commonly called a lam, for each treadle and to individually connect each lam to its respective treadle and to individually suspend each lam from the main frame of the loom by a plurality of links and levers, the size and arrangement of which are the same for each harness frame and to interpose a vertical bar commonly called a jack between each lam and its respective harness frame.

A still further object of the present invention is to pivotally connect a pair of links to the opposite ends of the lam and to connect an inwardly extending lever to the upper portions of each of the said pair of links and to provide a horizontal jack element and connect the ends of the same to the inner extremities of the said inwardly extending levers and to suspend the inwardly extending levers from a pair of links pivotally secured to the main frame, which arrangements will cause the said jack element to rise when the lam is pulled downwardly and thus raise the jack connected to the central jack element, whereby the harness frame supported on the jack is raised.

A still further object of the present invention is the provision of a mechanism for raising the harness frames of looms, that is durable, simple in construction, positive in operation, economiv2 cal to manufacture and highly efficient and serviceable in use.

other objects and advantages will be apparent during the course of the following descriptio'ri.

In the accompanying drawings forming a part of the specification, wherein for the purpose of illustration like numerals designate like parts throughout the same.

Fig. 1 is a front elevational view disclosing the main frame of la loom and one of the harness frames slidably mounted therein, illustrating the improved and specially constructed lever mechanism provided for raising the harness frame.

Fig. 2 is a vertical sectional view tak-en through line 2-2 of Fig. 1, looking in direction of the arrows, showing a series of harness frames supported on their respective jacks and the mechanism for raising the same. Y

Fig. 3 is a top plan view of the main frame and the series of harness frames mounted therein, also showing the series of treadles secured to the [bottom front portion of the frame, and

Fig. 4 is a horizontal sectional fragmentary view taken through line 4-4 of Fig. 1, looking downwardly in direction of the arrows.

Referring in detail to the drawing and numerals thereof, the numeral 'I designates the main frame of the loom, as a whole, which main frame is shown as comprising front and rear corner uprights oppositely disposed intermediate uprig-hts 8 and 9, bottom front and rear cross bars Il) and I I, respectively, oppositely disposed intermediate side cross bars I2 and I3, respectively, and bottom side bars I4 and I5, respectively, all of which are secured one to the other in any suitable manner.

Numerals I6, I1, I8 and I9 designate four harness frames, all of which are vertically positioned in the main frame and slidably mounted therein as disclosed to advantage in Figs. 1 and 2. The numerals 20, 2l, 22 and 23 designate the vertical lifting bars commonly called jacks, jacks which are operated and controlled by the treadles 24, 25, 26 and 2l, respectively. The treadles 24, 25, 26 and 21 are suspended from individual horizontal cross bars 28, known in the art as lams, by vertical cables 29, 30, 3| and 32, respectively. To the ends of each lam 28 are pivotally connected angularly upwardly extending links 33 and 34. The upper ends of the links 33 and 34 in turn are pivotally connected to the outer ends of a pair of inwardly extending levers 35 and 36, respectively. The inner ends of the levers 35 and 36 are pivotally connected to opposlte ends of a transversely extending member 31 which is mounted on the lower end of each downwardly extending jack 20, 2|, 22 and 23 (Figs. 1 and 2). The inwardly extending levers 35 and 36 are fulcrumed intermediately of their lengths, by links 38 and 39 which suspend the levers 35 and 36 from the main support frame of the loom. The treadles 24, 25, 26 and'Z'Il are provided with iiat spring members 40, 4i, 42 and 43, respectively, for resiliently retaining the treadles in their upper positions as illustrated in Fig. 2, the inner end portions of the said at spring members lying mounted on and secured to the front bottom bar of the main frame.

From the foregoing description taken in conjunction with the accompanying drawings it will be noted that when any one of treadles are pressed downwardly as shown by the dot and dash lines in Fig. 2, the respective harness frame'.v

connected to the treadle,- Will be raised upwardly. It will be particularly noted the length of movement is equal on all treadles and the pressure required to press the treadles downwardly is equal. Likewise a direct straight pull is exerted on the 1am and all angular movements are eliminated.

Having thus illustrated and described acertain form of construction and arrangement of parts pertaining to the invention it is to -be understood that the drawing is to be taken merely as an example of the same and that any suitable size, form and arrangement of parts can be employed without departing from the spirit of the invention of the scope of the subjoined claims.

Having thus described our invention, we claim:

1. A device of the character described for use on a loom having a main support and a series of harness frames slidably mounted therein; a jack connected to each harness frame for movement therewith, a horizontal bar connected to the jack of each harness frame, a pair of oppositely dis- 4 posed levers connected to the outer extremities of each horizontal jack bar, a pair of suspension links connecting the laterally extending levers to the main support whereby the laterally extending levers are suspended therefrom, a lam positioned beneath said oppositely disposed levers, a pair of connecting links connecting the 1am to :the laterally extending levers' whereby'the lam is Ysuspended therefrom, and a plurality of treadles one of which is suspended from each lam for imparting an equal upward movement to each of the harness Aframes on a predetermined movement ofthe treadle associated therewith.

2.*Actuating mechanism for a loom harness rframeslidably'mounted in a loom main support,

'said mechanism comprising a jack element connected to s aid harness frame for movement therewith, a pair of levers pivotally connected to REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,911,822 Gilmore May 30, 1933 2,250,061 Gilmore 1 July 22, 1941 2,458,069 Gilmore Jan. 4, 1949 

